Shogo Yamaguchi (山口 翔悟, Yamaguchi Shōgo, born February 19, 1983) in Aichi Prefecture is a Japanese actor. He debuted as an actor in V-cinema in 2001, and made his theatrical film debut in 2003 in Azumi. His first main lead starring role was in the tokusatsu television series Madan Senki Ryukendo in 2006, which was a major breakthrough and made him rise to worldwide fame, and is also considered to be his best and most memorable performance to date. In 2008, he was selected from an audition of 500 actors to play the male lead against the heroine in the NHK Asadora Dandan. His other notable roles are in the movie Parazoku: Parapara ja Naika (2006) and the television series Hanchō.